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Finding the Fourth Proportional to 979.02, 1,468.89 and 491.99

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Solution

The fourth proportional to 979.02, 1,468.89 and 491.99 is: 738.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.02 : 1,468.89 = 491.99 : x
  2. Step 2: Convert to fraction form
    979.02/1,468.89 = 491.99/x
  3. Step 3: Cross multiply
    979.02x = 1,468.89 × 491.99
  4. Step 4: Simplify right side
    979.02x = 722,671.85
  5. Step 5: Solve for x
    x = 722,671.85/979.02
  6. Step 6: Final answer
    x = 738.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.